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i Ivigure 3.9 Record of pressure versus time, showing high-frequency
~~
‘oscillation due to play in the turntable. Shot 2,
i
Station 123.05. Calibration step: 5 psi.
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Figure 3,10
eveling off due to over-damping and ciogging
time
cf thy se-boime inlet hole. Shot 2, Station 123.05.
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Figure 3.11
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abe
vedrerncacune
Record of pressure versug
tine, showing a 100
magnification because ofithe small deflection due to
low yield. Shot 3, Station 122Pps Calibration step;
5 psi.
angular rotation of the microscope can be reada ito,minutes.
There-
fore the reading equipment is capable of resotving ime to 1 msec.
By this method arrival time and durations of voeltiva and negative
phases are determined.
3.10.2
LU}
Record Photography
For ease in reading the records, a projection attachment waa
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